File cap2.tgz was produced with the command - cd; tar czf /tmp/cap2.tgz cap2 To extract the files in this tarball, change to the directory you want cap2 to be a subdirectory of, and enter - tar xzf /tmp/cap2.tgz The tarball contains an executable binary for the CAPLIB2 APL interpreter, cap2/bin/apl2, and an archive, cap2/lib/libcap2.a, with all the object files for the CAPLIB2 subroutines. However, if you'd like to recreate the executable binary and archive from the original source, change to the cap2 subdirectory, and do these commands: rm makefile; make NOTE: Don't make the mistake of doing "rm Makefile; make." The Makefile in this directory contains instructions for building makefile, then recursively calling make. For a brief introduction to the CAPLIB2 APL2 interpreter, see the READ.ME file.